256634314652122 has 32 divisors (see below), whose sum is σ = 420439328709120. Its totient is φ = 116515241331120.

The previous prime is 256634314652113. The next prime is 256634314652129. The reversal of 256634314652122 is 221256413436652.

It is a happy number.

It is a super-2 number, since 2×256634314652122² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256634314652122.

It is not an unprimeable number, because it can be changed into a prime (256634314652129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242958373 + ... + 244012375.

It is an arithmetic number, because the mean of its divisors is an integer number (13138729022160).

Almost surely, 2^{256634314652122} is an apocalyptic number.

256634314652122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256634314652122 is a deficient number, since it is larger than the sum of its proper divisors (163805014056998).

256634314652122 is a wasteful number, since it uses less digits than its factorization.

256634314652122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066978.

The product of its digits is 12441600, while the sum is 52.

The spelling of 256634314652122 in words is "two hundred fifty-six trillion, six hundred thirty-four billion, three hundred fourteen million, six hundred fifty-two thousand, one hundred twenty-two".